Screw threaded fastener



June 20, '1950 n. w. BAINBRIDGE ET AL. 2,512,082

scREw THREADED FASTENER Filed May 17, 1948 9055er cfa-AQHA; JNVENToRs.

Patented June 20, -195() ENT OFFICE SCREW THREADEDFASTENER t Richard W. `Bainbridge andRobert L. Jordan, lif.; saidvJ'ordan assignor South Pasadena, Ca to said Bainbridge Application May 17, 1948, Serial No. 27,485

l This invention relates to the construction of reel seats for usel on fishing tackle, the reel seat of this invention being characterized by its stability, economic construction and ease of operation. The invention is particularly directed to an adjustable reel seat whereby reels may be detachably connected, the reel seat also furnishing a means for connecting a detachable rod and handle.

Fishing rods and their component parts are subjected to considerable abuse, inasmuch as they are exposed to various weather conditions and placement on sand, earth, whereby grit, sand and other foreign matter may readily enter the movable or working parts. Most reel seats are provided with means whereby the clamping bar of a fishing reel may be connected thereto. In many instances, the clamping means include a threaded i member and a ypair of nuts, whereby the threaded member may be moved or adjustedand held in a desired clamping position. Such construction has numerous disadvantages, among them being the limited size or surface area ofthe nuts. These relatively small nuts are diiiicult to adjust` and, moreover, have a tendency to stick or freeze together, necessitating the use of much force or eX- traneous tools in loosening them to remove a reel or to dismantle the tackle. Moreover, prior constructions made no provisions for either preventing the ready entry of sand, grit and other foreign F matter, nor provided means whereby .the sand or grit was precluded from damaging the threads or other working parts. Finally, light weight'is a highly desirable characteristic ofiishing reels. and prior constructions involve numerous parts which increase the weight of the equipment.

It is an object of the Present invention, therefore, to disclose and provide a relatively light weight reelseat including yav tubulary body adapted to receive and firmly hold the fishing rodor tip, a handle and a removably 'attachab'le fishing reel. Generally stated, the tubular body member contemplated by this invention carries a fixed; clamp collar attached to the headof the body, a lower clamp ring adapted for longitudinal movement upon the body, a locking sleeve slidably carried-by the body, said locking sleeve being externally threadedan d an internally threaded nut sleeve mounted for rotation about the body, said single nut sleeve being internally threaded for cooperation with the locking sleeve. The internally threaded nut sleeve "is large and covers the threads of the locking sleeve, so that the sleeve may be readily actuated. Moreover, the

invention contemplates that the threads are l formed in the sleeves in such manner that 4large crest -clearance exists between matingthreads, preventing sand, grit or other foreign matter from clogging the threads. The 'use of locking nuts is eliminated, the threads themselves engaging in iclaim. (c1. tri-46) suchwise as to prevent accidental dislodgement.

An object oi the present invention, therefore, is to disclose and provide a new and improved reel seat. y

A .further object of the invention is to disclose and provide a reel seat which is free from locking nutsand which presents a large, easily grasped. knurled surface by means of which the clamping members maybe actuated. l

A still `further object of the invention is to disclose and provide a reel seat in which threaded surfaces are normally covered and protected from the abrasive action of grit, sand and other for-4 eign matter.

These and other objects of the invention will become apparent to those skilled in the art from the following description of an exemplary form ofD theinvention. In such description, reference will be hadto the appended drawings, in which:

Fig. lfis a, side elevational view of a reel seat, the reel being shown in broken lines, together with a portion of the rod tip and butt.

.lig. 2 is .a longitudinal, vertical, sectional view taken through the seat shown in Fig. 1.

Fig. 3 is a sectional view taken along the plane III-111 or Figa.

. Fig. 4 is a sectional view taken along the plane IV--IV of Fig. 2.

f Fig. 5 is a sectional view taken along the plane V-V of 2. y

Fig. 6is a greatlyenlarged fragmentary view of the threads utilized inthe reel seat.

vIn the drawings, the reel seat is generally iny dicated'jat I, the butt or ferrule end of the rod isy indicated at 2, a removable handle is indicated at 3 and the reel is indicated at 4.

' The reel seat I comprises a tubular body member Il! and is provided with a longitudinally ex- A, tending, outwardly directed key II, which may be formed byt pressing a ridge of metal out of the wall of the tubular body member I0. The tubular bodyisarranged'to receive and grasp the ferrule carried .byv 'thebutt section of the rod 2 and a corresponding ferrule carried by the upper end of a handle, such as 3. In this manner, the reelseat forms raA means ofv connecting `the `handle and rod. Mounted upon the body member are two clamp collars.v ,Both yof these clamp collars may be provided withv keyways arranged to cooperate with the key'l I..V A clamp collar I2 is rmly attached to the head end ofI the `body I0 by engagement with the' key I I andby soldering or the like. A portion lof the` skirt'of the clamp collar I2 is flared away from .the body IIJ to form a recess I3 adaptedyto (receive. one end of a clamp bar 5 of the reel'4. t y

Slidably mounted uponr the body I0 is a clamp ring I4,"also 'provided with a keyway arranged to coopk atewith'tliekey II of the body I0. A p'ortaal-arche skirtof'theciamp ring I4 is flared away from the body I so as to provide a recess I5 adapted to receive the other end of the clamp bar 5 of the reel.

Longitudinally movable along the body I0 is a locking sleeve I6 provided with a keyway cooperating with the key II. The locking sleeve I6 may be provided with a shoulder I'I adapted to abut the clamp ring I4. The butt end of the locking sleeve I6 is externally threaded and in engagement with an external, cylindrical, internally threaded nut sleeve I8. The nut sleeve I8 is provided with an inwardly extending, circular flange i9 arranged to keep the main portion of the nut sleeve I8 positioned concentrically about the body I8. Longitudinal movement of the nut sleeve I8 is prevented by means of stop rings 2U and 2 I, which may be soldered or otherwise firmly held by the tubular body I8. These stop rings 20 and 2I slidably contact opposing faces of the flange I9, thereby preventing longitudinal movement of the nut sleeve I8, while permitting its ready rotation about the body I D.

It may be noted that the external surface of the nut sleeve I8 is knurled or otherwise roughened, so as to facilitate grasping and operation thereof. Moreover, the nut sleeve has a greater length than the threaded portion of the locking sleeve I6, thereby permitting almost the entire length of the locking sleeve I6 to be covered by the nut sleeve when the device is in -a collapsed position.

The external threads on the locking sleeve I6 and the internal mating threads on the nut sleeve are of a self-clearing type. Moreover, in their preferred form, the profile of these threads is such that substantially no appreciable side wall contact exists. The prole of the threads is such that grit, sand, earth, foreign matter, may enter between the mating threads without jamming them or otherwise impairing their utility.

The self-clearing and self-locking threads employed in the preferred embodiment of this invention are illustrated in Fig. 6. It will be noted that the threads exhibit a virtually parabolic profile, the sides 3l and 32 being congruent. The threads are characterized by having a relatively small pointed crest, such as 33 and 34. Moreover, the distance between the points of engagement is appreciably smaller than the depth of the threads. When, for example, no appreciable longitudinal pressure exists between the locking sleeve I6 and the nut sleeve I8, the crest 34 may well ride in the position indicated in dash lines at 34', and in this position it will be noted that considerable space exists between the threads formed in the nut sleeve I8 and the locking sleeve I6. Obviously, grit or. other foreign matter could exist between these two mating threads without detrinient. When, however, a reel is being fitted to the seat and the locking sleeve i6 is being forced longitudinally along the tubular body I9 by rotation of the nut sleeve I8, the locking sleeve forcing the clamp ring I4 onto the end of the clamp bar of the reel, the mating threads will assume the position indicated in full lines in Fig. 6, and the crest 34 will engage the side wall 32, Whereas the crest 35 will engage the side wall of the mating thread, It will be noted that only line contact along the crests will exist between the two mating threads. As the clamping bar of the reel is grasped by the clamping ring and clamp collar, concentrated lines of pressure exist between the crests of the teeth on the locking sleeve and nut sleeve, and the threads thereby become stressed and hold the clamping ring in position.

It will be evident that the threads described hereinabove do not depend on large surface area in contact, but instead depend upon spaced lines of contact in order to hold the two threaded members in locked position. In actual practice, it has been found that reels may be quickly seated and unseated by the use of the construction described hereinabove. Appreciable quantities of sand and other foreign matter may constantly find their way between the two threaded members I6 and I8 without impairing the eiciency of the device or interfering with the utility of the reel seat. It may be noted, however, that relatively resilient metals should be employed for both the locking sleeve and nut sleeve, and in actual practice chromium-plated brass tubing has been found very effective.

Although the lower clamp ring I4 has been shown as a separate element, it may be integral with the sleeve I6. Advantageously, however, the clamp ring I4 is formed as a separate element, permitting the use of lighter material in the locking sleeve I6. Furthermore, since the clamp bars` of some reels may be slightly misaligned, it has been found desirable to employ a relatively large keyway, such as is indicated at 23 in the clamp ring I4, permitting the ring I4 to partially rotate about the body I0 and thereby assume a position more receptive to the engagement of the clamp bar of the reel.

By forming the key Il throughout the length of the body I9, a groove or recess is formed in the inner surface of the body I0 and this groove facilitates the insertion and removal of the ferruled ends of the butt of the rod and the handle. The groove prevents the formation of a vacuum within the body I0 when the assembly is being dismantled.

From the description given hereinabove, it will be evident that the entire reel seat may be simply constructed, has few parts, may be readily cleaned, is easily adjusted and will not clog or wear rapidly when subjected to abuse. It is to be noted that no adjacent locking nuts are employed, the reel being clamped upon the seat simply by the engagement of the crests of the mating threads formed in the locking sleeve and nut sleeve. All changes and modifications coming within the scope of the appended claim are embraced thereby.

We claim: A

In a device including a longitudinally movable member in threaded engagement with a rotatable, longitudinally immovable member, the provision of: mating threads formed with relatively small pointed crests, the root and sides of each thread forming a congruent, virtually parabolic proiile, the distance between the points of engagement being appreciably smaller than the `depth of the threads, whereby large crest clearance exists between said mating threads.

RICHARD W. BAI'NBRIDGE. ROBERT L. JORDAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENI'S Number Name Date 911,117 Croiser Feb. 2, 1909 1,980,317 Clark et al Nov. 13, 1934 2,029,188 Potter June 28, 1936 

